Ten feeders, eight breakers, zero surprises

A public utility district built a new 115 to 12.47 kV substation with an 8-position ring bus and ten feeder getaways. Our team provided the owner’s commissioning: relay testing, design review, drafting, and the troubleshooting that keeps an energization date honest.

RELAY AND CT TESTING

We wrote the relay test plans, then performed relay testing, logic verification, and current transformer testing at every position.

DESIGN REVIEW

Acting as the client’s engineer, we reviewed and corrected relay design submittals, calculations, time-current coordination, logic packages, and controller settings before they reached the field.

On a ring bus, one unverified interlock does not cause an outage. It causes a sequence of them.

COMMISSIONING

We developed and ran commissioning procedures for batteries, breakers, LTCs, logic schemes, SCADA, and the power transformers, through energization.